Teat cup for use in connection with milking machines



Feb. 23, 1954 I sKETT 2,669,966

TEAT CUP FOR USE IN CONNECTION WITH MILKING MACHINES Filed NOV. 27, 1950INVENTOR HERBERT E. SKETT By I WM,

the lower open end of the liner 1). A tapered ring d, preferably made ofmetal, is caused to slide over the liner so that the latter is jammedbetween the internal surface of the ring and an external tapered surfaceof the bowl. The assembly is completed by placing a resilientlydeformable locking ring e, upon shoulder ,f of plug 0. The ring e ispreferably of rubber, and has its outside diameter slightly greater thanthe diameter of the lower opening of the shell where- 1 by it will beforced by the shell a into engagement with the shoulder f due to theupward force exerted upon the plug 0 by the extension of the liner b andretain the shell a, liner b and plug 0 as a completely assembled teatcup unit.

The tool illustrated in Fig. 2 comprises a rigid vertical peg g mountedon a fiat base g. the bowl and the liner have been secured together, andafter the liner has been inserted in the shell, the assembly is placedon the peg with the hooded portion of the liner pointing towards thebase. The peg will then engage the inside of the hollow plug, and,'onpressure being applied to the teat cup, the peg will push the plugthrough one end of the shell, thus applying tension to the liner, andallowing the locking ring to be attached. v

I claim: 7

1. A teat cup for use with a milking machine comprising an outer rigidshell open at its upper and lower ends, an extensible tubular linerdisposed within said shell and having its upper portion overlying theupper end of said shell, a connector plug having an upper and lowerportion, said upper portion of said plug being of greater externaldiameter than the internal diameter of said tubular liner to assure afit of said liner thereover, the lower portion of said plug beingadapted to receive a milk tube, said upper portion of said plug joiningsaid lower section at a flared portion defining a shoulder, the maximumdiameter of said plug being slightly less than the diameter of the loweropening of said shell, means in engagement with said liner for retainingsaid liner and the upper portion of said plug in positive frictionalengagement, and a resiliently deformable locking ring adapted to seatupon the shoulder of said plug and having a diameter slightly greaterthan the diameter of the opening of the lower end of said shell wherebysaid plug is prevented from being pulled up into said shell under theforce of said extensible liner.

2. A teat cup for use with a milking machine After comprising an outerrigid shell open at its upper and lower ends, an extensible tubularliner disposed within said shell and having its upper portion overlyingthe upper end of said shell, a connector plug having an internal boreaxially therethrough, said connector having upper and lower portions ofinverted frusto-conical form, said upper portion joining said lowerportion at an outwardly flared portion defining a shoulder, the lowerportion of said tubular liner being extended over the conical base ofthe upper portion of said plug, means for insuring positive engagementbetween the lower end of said liner and the upper portion of said plug,the lower portion of said plug being adapted to receive a milk tube, themaximum outside diameter of said plug being slightly less than theinternal diameter of the lower end of said shell, and a resilientlydeformable locking ring adapted to seat upon the shoulder between theupper and lower portions of said plug, said locking ring having adiameter slightly greater than the diameter of the opening of the lowerend of said shell whereby said plug is prevented from being pulled upinto said shell under the force of said extensible liner.

3. A teat cup as claimed in claim 2 wherein said means for insuringpositive engagement between the lower end of said liner and the upperportion of said plug is a tapered ring axially slidable partially overthe upper portion of said plug for retaining the lower end of the linerin positive engagement with the upper inverted frusto-conical portion ofsaid plug, the taper of said ring being frusto-conical with the base ofthe taper being inverted as is the upper portion of said plug.

HERBERT EDWARD SKETT.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,574,265 Sutherland Feb. 23, 1926 1,701,072 Hapgood Feb. 5,1929 2,055,718 Davis Sept. 29, 1936 FOREIGN PATENTS Number Country Date24,260 Great Britain 1909 409,517 Great Britain May 3, 1934 102,344Australia Oct. 26, 1937 118,404 Australia Apr. 13, 1944 610,301 GreatBritain Oct. 13, 1948 652,723 Great Britain May 2, 1951

